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Science · 2024 · 3 marks
CBSE 2024 · Region 4 · Set 2 · Q30
How is the sex of a newborn individual determined in different species of animals? Give three examples to support your answer.
How is the sex of a newborn individual determined in different species of animals? Give three examples to support your answer.
Marking-scheme solution
Three examples:
In some animals, the temperature at which the fertilized eggs are kept determines whether the animals developing in the eggs will be male or female.
In snails, individuals can change sex.
In human beings, the sex of the individual is genetically determined i.e. genes inherited from parents decide whether the child will be a boy or a girl.
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CBSE Class 10 Science past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.